Improvement in machines for cutting and bending metal bars



2 Sheets--Sheet1.

a. HALE. Machines for Cutting and Bending Metal Bars.

.PatentedJuneIfiJBH.

\nverjror 1 V Witnesses:

UNITED STATES PATENT OFFIon.

ROBERT HALE, OF MINNEAPOLIS, MINNESOTA.

IMPROVEMENT IN MACHINES FOR CUTTING AND BENDING METAL BARS.

Specification forming part of Letters Patent No. 152,106, dated J unc 16,1874; application filed April 11, 1874.

To all whom it may concern:

Be it known that I, ROBERT HALE, a resident of Minneapolis, Minnesota, have invented certain new and useful Improvements in Machines for Cutting Off and Bending Metal Bars, of which invention the following is a clear, full, and exact description.

To enable others skilled in the art to make and use my invention, I will proceed to describe the exact manner in which I have carried it out, reference being had to the accompanying drawings making a part of this specification, in which- Figure l is a plan view of my invention. Fig. 2 is a side elevation. Fig. 8 is a longitudinal section. Fig. 4 is a view of a portion of the bottom. Fig. 5 is an enlarged view of the cutter. Fig. 6 is the cutter detached. Fig. 7 is a view of the segments F F.

In the draw1ngs,W is an iron frame or bed, with legs to secure the requisite height. The steam-cylinders O O are placed at one end of the frame, the object of these cylinders being to furnish the required power to operate the connected machinery. Other power may be applied, if found desirable. The pistonrods N connect with the double crank-shaft K by the connecting-rods M. The band-wheel Q and the balance-wheel P are secured to the shaft K. On the same shaft is a cam, Y, for operating the lever X. The cross'head. H is held by the guide-boards I I, and receives a reciprocating motion from the crank-shaft through the connectingrod J. The segments or formers F F have their inner or near ends bedded in the cross-head H, being held in place by the plates 9, pivoted to each, as shown in Fig. 1. The adjustable gu de-blocks D D are pivoted at their outer ends, and are moved by means of the wedges E E from or toward the die-block-A, and by the wedges can force the formers close around the dieblock. This die-block is dovetailed into the solid iron frame or bed W, and is held firmly in position by the backing-piece O. In the lower part of the front of the die-block 1s a vertical oblong slot to allow the upper end of the spring f to enter, which spring forces the shoe or other article formed back from the die-block, and allows it to drop through the opening 1. (See Fig. 3.) That the spring itself may return to the slot before the crosshead starts on its return stroke, the plate is so placed as to cause the spring-catch h to disconnect from the lever-bar k, and this allows the spring to return to its position in the slot. Theletter V designates a gibbed cutting-tool standard, and U the plunger thereof, carrying the chisel t, as worked by the lever X, having its fulcrum in the standards 01. Z is an upright guide for the lever. The cam Y 011 the crankshaft K operates the lever X and plunger U. The chisel t is adjustable, being socketed in the transverse gibbed slide 8, (see Fig. 5,) and the adjustment is regulated by the thumb-screw T. A gibbed bed-plate is placed immediately under the cutting-tool t, and embedded in the iron frame W. When a piece is to be cut from a metal bar for the purpose of giving a particular shape to the ends thereof, a suitable hole is made through the gibbed bed-plate opening into the hole in the main frame. The gibbed slide receives its adjustment from the screw Y through the attached connection It. The screw has upon one end a right-hand thread, and upon the other a left-hand thread, and it is operated by means of a crank. (See Fig. 1.)

In the operation of my machine, the crosshead H, with its attached formers F F, is thrown back from the forming or die block A, and the bar of metal to be cut and bent is fed in under the cutting-tool t, with its inner end being set against the guide It. At this point the cam forces the end of the lever X up, and at the same time forces down the plunger and chisel, cutting the bar off at the required length, and giving the ends so cut the requisite shape. Now the cross-head H, with its formers F F, moves forward, carrying the outer ends of the piece of metal, the center being forced into the groove around the die-block A. The formers F F, after having partially rounded the piece of metal, come in contact with the guide-blocks D, the said blocks forcing the formers close to the die-block, and thereby forcing the metal to e be bent into the groove of the block, and securing the desired form. The cross-head in its backward movement forces the formed metal, whether horseshoe or other article,out from the blockby means of the catch-bar h,

provided with the guide It and connectionrod B, the adjustable cutting-tool t, with its gibbed plate, and the plunger U, with suitable machinery for operating the same, substantially as and for the purpose set forth.

2. In combination with the die-block A, formers F F, and cross-head H, the catch-bar h, lever k, and spring f, constructed and operated as described.

ROBERT HALE.

Witnesses:

IV. R. WILLARD, VERNON BELL. 

